F2 - SEM1 - What Is Flooding - 3.3 Flashcards
What are the 3 Preventive measures?
Engineering works - Man made structures and improvement works help regulate river discharge and increase channel capacity
Land use planning - Proper land use planning helps tackle flooding effective
Flood warning system - Issue warning signals according to the water level of rivers so that government and people can take precautionary measures (evacuation, stack sandbags)
What are the 2 Remedial measures?
Immediate rescue - Send rescue team to impacted areas to save people. Emergency supplies are provided to the victims
Clean-up works - Clean street and drain away floodwater. Repair damaged infrastructure (roads, bridges and electricity poles)
___________ are sent to the impacted area to save people, emergency supplies including ___________ and water are provided for the victims
Rescue teams food and water
After a flood the streets are cleaned and the floodwater is drained away. ________________________ such as railways bridges and electric poles are _________ as well
Damaged infrastructure repaired
The government uses technology to monitor rainfall. It also sets up f_______________ according to the water levels of rivers.
Flood warning signals
When flooding is expected, an early warning will be issued so that government departments and people can take _____________________
Precautionary measures
why are dams and reservoirs built
to regulate river discharge downstream and store water
why are dykes built
to increase channel capacity and prevent rivers from overflowing
why are river channels straightened, widened and deepened
to increase the speed of river flow and channel capacity
what helps remove mud from river beds and maintain channel capacity ?
dredging
what is the programme name carried out in chang jiang to help reduce soil erosion and the silting of rivers
returning farmlannd to forest programme
what are the preventive measures
- building dams, reservoirs and dykes; straightening, widening and deepening river channels; carrying out dredging carefully
- carrying out afforestation; restoring lakes; adopting land use zoning
- setting up flood warning system
What are the 2 main measures government used to reduce the flooding?
Preventive measure (before rainstorm)
Remedial measure (after flooding)
What are the Engineering works done to help regulate river discharge and increase channel capacity?
Build dams and reservoirs - regulate river discharge and store rainwater
Build dykes - increase channel capacity and prevent rivers from overflowing
Straighten, widen and deepen river channels - increase the speed of river flow and channel capacity
Dredging - remove mud from river beds and maintain channel capacity
What are the land use planning done to tackle flooding effectively?
Increase forest cover - carry out ‘Returning Farmland to Forest Programme’ and afforestation along Chan Jiang to reduce soil erosion and silting of rivers
Protect and restore lakes - carry out ‘Returning Farmland to Lake Programme’ and ban illegal reclamation of lakes to restore lake capacity
Land use zoning - plan the density of development along rivers according to the risk of flooding
